CN1297676C - High plasticity magnesium alloy containing rare-earth yttrium - Google Patents

High plasticity magnesium alloy containing rare-earth yttrium Download PDF

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Publication number
CN1297676C
CN1297676C CNB2004100812585A CN200410081258A CN1297676C CN 1297676 C CN1297676 C CN 1297676C CN B2004100812585 A CNB2004100812585 A CN B2004100812585A CN 200410081258 A CN200410081258 A CN 200410081258A CN 1297676 C CN1297676 C CN 1297676C
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magnesium alloy
present
alloy
magnesium
alloy containing
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CN1616697A (en
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丁培道
张丁非
潘复生
彭建
董国振
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Chongqing University
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Chongqing University
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Abstract

The present invention discloses a high plasticity Mg alloy containing rare-earth Y, which is characterized in that the Mg alloy is composed of components of the quality percentage: 5.0 to 8.5 % of Zn, 0.6 to 0.8 % of Zr and 0.7 to 2.0 of Y; the rest is Mg and unavoidable impurities. The material of the present invention can keep the high strength of the traditional Mg alloy, and the plasticity is greatly improved. The present invention can be used in industrial production; through the plastic forming of metal, the present invention can process plates, bars, pipes, sectional bars and forging products with various sizes; in addition, the present invention can control the microstructure and the performance by thermal treatment.

Description

A kind of high plastic magnesium alloy that contains the rare earth yttrium
Technical field
The present invention relates to a kind of metallic substance, particularly a kind of yttrium rare earth element that adds is to improve the magnesium alloy of alloy extruding plasticity.
Background technology
China's magnesium ore resources is abundant, and therefore, the magnesium alloy materials of research and development excellent property, multi-size plays a very important role to the national economy tool.Magnesium alloy is a kind of novel light metal material, it is the lightest structural metallic materials in the present industrial application, have performances such as higher specific tenacity, specific rigidity and good damping noise reduction and machining, have wide practical use in fields such as aerospace, the vehicles and 3C Products.At present, the demand of magnesium and magnesium alloy develops into the third-largest metallic substance after iron and steel and aluminium alloy gradually with annual rate increase more than 20%.
Magnesium alloy materials can produce the various plate of size, rod, pipe, section bar and forging products by viscous deformation, and can be by the tissue and the performance of thermal treatment control material.Because the crystalline structure of magnesium alloy is a close-packed hexagonal structure, and the modal slippage of magnesium and magnesium alloy is the basal plane ({ 0001}<11 20 〉) of α Bai Shi vector and faceted pebble slip system ({ 1 100}<11 20 〉), and 5 how much slip systems and 4 independent slip modes are provided altogether.The faceted pebble slip system is torpescence at normal temperatures, and slip system is difficult to slide, so plasticity ratio is relatively poor, has seriously limited Application of Magnesium.
Domestic and international many research units are to improving the superplasticity that magnesium alloy plasticity mainly is the research magnesium alloy at present.Because the superplasticity of magnesium alloy generally is just can realize under the strain rate very slowly, can not be used for industrial application.Traditional high-strength magnesium alloy generally is meant the Mg-Zn-Zr alloy, and its typical alloy designations is ZK60, and maximum characteristics are intensity height, generally at 320~350MPa, but has the shortcoming of plasticity difference, and elongation after fracture generally is no more than 12%, has limited its range of application.
Summary of the invention
Purpose of the present invention provides a kind of magnesium alloy materials.It has improved its plasticity greatly under the strength condition of the traditional high-strength magnesium alloy of maintenance, be beneficial to plastic forming.
The implementation method of the object of the invention is, this magnesium alloy is made up of Mg, Zn, Zr, Y etc., and each constituent mass percentage composition is Zn:5.0~8.5%; Zr:0.6~0.8%; Y:0.7~2.0%, remainder are Mg and unavoidable impurities.
Magnesium alloy of the present invention better consists of, and each constituent mass percentage composition is Zn:5.5%; Zr:0.8%; Y:2.0%, remainder are Mg and unavoidable impurities.
Unavoidable impurities of the present invention is Fe, Si, AI, Mn, its total amount<0.1%
Smelting process according to common magnesium alloy obtains above-mentioned magnesium alloy materials, carries out homogenizing and handles, and pushes on extrusion machine, and cooling fast can process various magnesium-alloy materials simultaneously.
Advantage of the present invention is:
1. homogenizing is handled and can be made zinc, yittrium alloy element solid solution in magnesium matrix, and cools off fast when squeezing out bar subsequently, and alloying element and magnesium matrix form sosoloid, and alloy has been played strengthening effect.
2. this magnesium alloy has improved the content of zirconium, because zirconium has the effect of obvious crystal grain thinning, so the increase of zirconium content, helps improving the over-all properties of alloy.
3. need adjust its extrusion temperature according to the material and the technology of metal during owing to the metal extruding, and the extrusion temperature of magnesium alloy of the present invention has substantially exceeded the recrystallization temperature of alloy, dynamic recrystallization has taken place in the extrusion process, after the extruding through quick cooling, recrystallize is just finished, and crystal grain has little time to grow up, so bar crystal grain is tiny, has improved the plasticity of material to a certain extent.
4. because the adding of yttrium has hindered the expansion of crystal boundary, just stop growing up of crystal grain, further refinement crystal grain, vital role has been played in the raising of plasticity.
The intensity of the high-strength magnesium alloy that material maintenance of the present invention is traditional improves its plasticity greatly, can be used for industrial production.By can processing the various plate of size, rod, pipe, section bar and forging products to metal plastic forming, and can be by the tissue and the performance of thermal treatment control material.
The present invention is described further below by embodiment.But the present invention is not limited only to these examples.
Description of drawings
Fig. 1 is the magnesium alloy extruding attitude microtexture photo that is numbered A;
Fig. 2 is the magnesium alloy extruding attitude microtexture photo that is numbered C;
Fig. 3 is that the trade mark is the magnesium alloy extruding attitude microtexture photo of ZK60;
Fig. 4 is that the magnesium alloy that is numbered A is not taked fast cooling technology magnesium alloy extruding attitude microtexture photo.
Embodiment
Embodiment:
Use following prescription, press the common smelting process of magnesium alloy, can obtain the high plastic magnesium alloy (following is the quality percentage composition) that contains the rare earth yttrium of the present invention:
The alloy numbering Mg(%) Zn(%) Zr(%) Y(%) The total amount of Fe, Si, AI, Mn (%)
A Surplus 5.3 0.7 0.7 <0.1
B Surplus 5.5 0.8 2.0 <0.1
C Surplus 8.3 0.6 1.4 <0.1
By above-mentioned prescription, obtain magnesium alloy of the present invention with following method smelting:
1. melting: on semicontinuous casting equipment, carry out.The masterbatch composition is Mg:95.3%, Zn:4.0%, and Zr:0.30%, Y:0.40% with beginning heating after the flux covering, all melts at 700 ℃ of masterbatch, contains the magnesium alloy materials proportioning adding alloy element Zn ingot of rare earth then respectively by A, B, C.Zr, Y are the form addings with Mg-Zr, Mg-Y master alloy, and wherein the mass percent of Zr, Y is respectively 25.58,23.42, contain the adjustment of magnesium alloy materials ratio requirement Mg, the Zr of rare earth, the content of Y according to A, B, C.Stir after reinforced and continue to be heated to 750 ℃, leave standstill insulation 30 minutes, be cooled to 690~720 ℃ of casting afterwards, promptly get the ingot casting that A, B, C contain the magnesium alloy materials of rare earth.
Getting the magnesium alloy materials that above-mentioned A, B, C contain the rare earth yttrium follows these steps to experimentize respectively:
2. machining: carry out sawing, railway carriage etc. according to the size of extrusion machine container and be machined into suitable dimension;
3. homogenizing is handled;
4. extrusion processing: on extrusion machine, be squeezed into bar, simultaneously cooling fast.Main squeezing parameter sees Table 1.
The main squeezing parameter of table 1 Mg-Zn-Zr-Y magnesium alloy
Blank temperature The container temperature Die temperature Extrusion speed Extrusion ratio
400℃ 395℃ 360℃ 1.3~2.0m/min 55.75
5. Mechanics Performance Testing: according to GB228-2002 extruded bars is processed into the standard tensile sample, carries out tension test, draw performance data and see Table 2.
Table 2 extruded bars mechanical property
Alloy Tensile strength/MPa Yield strength/MPa Unit elongation (%)
A 322.10 263.56 18.37
B 322.88 267.98 20.17
C 337.57 263.98 21.45
ZK60 320~340 250~260 11~12
As can be seen from Table 2, add after the rare earth element, tensile strength of alloys is suitable substantially with former ZK60 magnesium alloy, and its yield strength slightly raises.But the variation of contrast unit elongation can find obviously that the unit elongation of magnesium alloy on average surpasses 20% behind the adding rare earth, has improved nearly one times than former ZK60, has improved the over-all properties of material greatly.
Referring to Fig. 1, Fig. 2.Fig. 1, Fig. 2 are the magnesium alloy extruding attitude microtexture photo of numbering A, C, and its crystal grain is more even, and average grain diameter probably is about 5~8 μ m; Referring to Fig. 3.Fig. 3 is ZK60 extruding attitude microtexture photo, and then big many of its crystal grain are on average at 30~40 μ m, referring to Fig. 4.Fig. 4 is the extruding attitude tissue that the magnesium alloy that is numbered A is not taked the fast cooling technology alloy A, and its grain-size is approximately about 20 μ m.
Conclusion: add high-load zirconium, rare earth metal yttrium and adopt quick refrigerative magnesium alloy, its viscous deformation performance improves greatly.

Claims (1)

1. high plastic magnesium alloy that contains the rare earth yttrium is characterized in that this magnesium alloy is made up of Mg, Zn, Zr, Y, and its each constituent mass percentage composition is Zn:8.3~8.5%; Zr:0.6~0.8%; Y:0.7~2.0%, remainder are magnesium and unavoidable impurities.
CNB2004100812585A 2004-11-11 2004-11-11 High plasticity magnesium alloy containing rare-earth yttrium Expired - Fee Related CN1297676C (en)

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Cited By (1)

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CN110144505A (en) * 2019-06-28 2019-08-20 南阳师范学院 A kind of degradable biological medical forging state magnesium alloy and preparation method thereof

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CN100340688C (en) * 2005-12-12 2007-10-03 西安理工大学 In-situ synthesizing quasi-crystal and approximate phase reinforced high-strength ultra-tough magnesium alloy and preparation method thereof
EP1835042A1 (en) * 2006-03-18 2007-09-19 Acrostak Corp. Magnesium-based alloy with improved combination of mechanical and corrosion characteristics
CN100569976C (en) * 2007-05-30 2009-12-16 中国科学院金属研究所 Effectively utilize rare earth element y to strengthen the preparation method of Mg-Zn-Y-Zr series magnesium alloy
CN101121979B (en) * 2007-09-20 2010-12-01 上海交通大学 Method for preparing Mg-Zn-Zr deformation magnesium alloy
CN101381831B (en) * 2008-10-29 2010-06-09 仝仲盛 High plasticity magnesium alloy
CN101798651A (en) * 2010-04-06 2010-08-11 重庆大学 High-performance wrought magnesium alloy material
CN101805864B (en) * 2010-04-06 2012-09-05 重庆大学 High-damping and high-strength Mg-Cu-Mn-Zn-Y alloy and manufacturing method thereof
CN101947632A (en) * 2010-08-25 2011-01-19 东北轻合金有限责任公司 Manufacture method of Mg-Zn-Zr serial magnesium alloy die forgings
CN103290292B (en) * 2013-06-24 2015-07-01 东北大学 High strength magnesium alloy and preparation method thereof
CN103421995B (en) * 2013-07-19 2016-01-20 西安理工大学 Silicon carbide and standard are brilliant and approximately strengthen magnesium base composite material and preparation method thereof mutually
CN103498086B (en) * 2013-09-13 2016-01-27 郑州大学 A kind of high-strength high-toughness magnesium alloy and preparation technology thereof
CN103952613B (en) * 2014-05-19 2016-02-03 重庆大学 A kind of high-yield-ratio wrought magnesium alloys containing cerium and yttrium
CN104099507A (en) * 2014-07-14 2014-10-15 沈阳工业大学 High-strength and high-toughness rare earth magnesium alloy
CN104328320B (en) * 2014-11-28 2017-01-04 重庆市科学技术研究院 A kind of high-strength high-plasticity magnesium alloy
CN112609114B (en) * 2020-11-27 2021-11-30 鼎泰(江苏)轻合金有限公司 Magnesium alloy and preparation method and application thereof

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Publication number Priority date Publication date Assignee Title
CN110144505A (en) * 2019-06-28 2019-08-20 南阳师范学院 A kind of degradable biological medical forging state magnesium alloy and preparation method thereof

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